1. Agnew, H. M., Bright, W. C., and Froman, D.: 1947, ?Distribution of Neutrons in the Atmosphere,Phys. Rev. 72, 203?206.
2. Akimov, V. V., Belov, A. V., Chertok, I. M., Kurt, V. G., Leikov, N. G., Magun, A., and Melnikov, V. F.: 1993, ?High Energy Gamma-Rays at the Late Stage of the Large Solar Flare of June 15, 1991 and Accompanying Phenomena?,Proc. 23rd Int. Cosmic Ray Conf., Calgary 3, 111?114.
3. Alvarez, M., Dorman, L. I., Gallegos, A., Libin, I. Ya., Ishkov, V., Miroshnichenko, L. I., and Perez-Peraza, J. 1990, ?Fluctuations of Galactic Cosmic Rays in Periods of Solar Flares?,Proc. 21st Int. Cosmic Ray Conf., Adelaide 6, 400?403.
4. Bazilevskaya, G. A., Makhmutov, V. S., Grigoryan, M. S., and Charakhchyan, T. N.: 1983a, ?Energy Spectra of Solar Cosmic Rays According to Balloon and Neutron Monitor Data?,Proc. 18th Int. Cosmic Ray Conf., Bangalore 4, 194?197.
5. Bazilevskaya, G. A., Stozhkov, Yu. I., Makhmutov, V. S., Charakhchyan, T. N., Borovkov, L. P., Vashenyuk, E. V., Lazutin, L. L., and Bimenov, D. Yu.: 1983b, ?The Results of Stratospheric Measurements of Solar Cosmic Rays with Energy >100 MeV in October 1981,Proc. 18th Int. Cosmic Ray Conf., Bangalore 4, 198?201.